Add support Solana blockchain

[gyengus]

Solana is growying rapidly. There are more NFT started on Solana blockchain. I think, it will be useful, if this application supports it.

[zypherion]

Agreed. An eth project I follow is releasing new batches of nfts on SOL. Would be nice to be able to show a mix of SOL and ETH nfts on one screen.